'''
id()
type()


a=1
print(id(a))
a=1
print(id(a))
print(type(a))
a=3.14
print(id(a))
print(type(a))
# 用于删除变量 del a,b,c
del a
b = True
print(b,type(b))
c = 4+3j
print(c,type(c))


m = 18
n = 30
temp = m
m = n
n= temp
print(m,n)

'''

m = 15
n = 30
m,n = n,m
print(m,n)

a = 18
b = 30

m = m + n
n = m - n
m = m - n

m = m*n
n = m/n
m = m/n

 










